Chapter 11 Review Guide
A) Textbook: Pg. 283 #1-10, and pg. 285 #1, 3-6, 9-12
*****Write both the question and the answer for full credit!!!!!
B) Please answer the following questions below.
1. Summarize Mendel’s four principles.
1) ______
2) ______
3) ______
4) ______
2. In meiosis:
a) Identify the end result: ______
b) When does crossing over occur? ______
c) Describe what happens during crossing over:______
d) What is the end result of meiosis I? ______
e) When do the sister chromatids separate in meiosis? ______
f) If a cell with a diploid number of 30 chromosomes undergoes meiosis, how many chromosomes will be in each gamete? ______
g) What is the SYMBOL used to show a diploid organism? ______Haploid? ______
3. Define:
multiple alleles ______
polygenic traits ______
codominance ______
incomplete dominance______
4. Differentiate between a gene and an allele.
5. Explain why horse breeders will pay a lot of money to breed one of their horses with a horse that has won the Kentucky Derby.
6. In guinea pigs, R= rough coat, and r= smooth coat. A heterozygous parent is crossed with a homozygous recessive parent. All offspring have smooth coats. Explain how this is possible!
7. a) Give the chromosome number of a normal diploid human cell? ______
b) Haploid number? ______
c) Number of chromosomes a normal sperm should carry? ______
8. Explain the law of segregation in your own words or using a drawing.
9. a) Synonym of homozygous: ______
b) Synonym of heterozygous: ______
10. How does crossing over relate to genetic variety?
11. Describe the principle of independent assortment.
Do the following crosses ON BINDER PAPER. SHOW YOUR WORK.
12. A cross between a brown guinea pig and a white guinea pig produces offspring that are all light brown in color.
a) What pattern of heredity is being exhibited? ______
b) Cross a light brown guinea pig with a brown guinea pig. List all possible genotypes and phenotypes of the offspring.
13. If yellow seeds=dominant, and green seeds=recessive, cross two parents heterozygous for this trait. Give genotypes and phenotypes of the offspring.
14. In rabbits, R=rough coats and r=smooth coats; B=brown coat color and b= white coat color. Cross two parents that are heterozygous for both traits. Give the phenotypes of the offspring (you do not need to list the genotypes).
15. A cross between a blue bird and a yellow bird produces what appears to be all green offspring. Upon closer inspection, the green offspring actually have individual blue and yellow feathers.
a) What pattern of heredity is being exhibited? ______
b) Cross a green bird with a yellow bird. Give all possible genotypes and phenotypes of the offspring.
16. In peas, the allele for tall plants is dominant over the allele for short plants. Also, purple flowers are dominant over white flowers. Cross a plant that is heterozygous tall, with white flowers, with a plant that is short, with heterozygous purple flowers. Give all phenotypes of the offspring (you do not need to list the genotypes).